These photos, courtesy of Gabriel Díaz-Montemayor, who is an architect, landscape architect and Assistant Professor at the School of Architecture and Landscape Architecture at Arizona State University, show the Ávalos smelter in production mode.

Ávalos Smelter (date unknown)

Ávalos Smelter (date unknown)

Inside the Ávalos Plant

Inside the Ávalos Plant

Inside the Ávalos Smelter

Inside the Ávalos Smelter